Grain-bleacher.



PATENTED FEB. 26, 1907. R. BARR.

H. J. CALDWELL & J.

GRAIN BLEAGHBR.

APPLICATION FILED JULY 11, 1904.

2 SHBETS-SHEET 1.

No. 845,446. PATENTED FEB. 26, 1907. H. J. CALDWELL & J. R. BARR.

GRAIN BLEAUHER.

APPLICATION FILED JULY 11. 1904.

2 SEBET$-SHEET 2L wzms g,

r srnn'i ron;

, HARRY .i. cnnw nin- AN JAMES R. "BARR, or EARL PARK, INDIANA.

GWAW MBLEAQHEQ.

No. sew-lee.

$pecificetion of Letters Patent.

escapees net. so, 1907 Application filed July 11, 1904. Serial No.216,038.

conditioning grain and remov ng must, rust,

disc-oloretions, etc.

The object of our present invention is to provide a simple andefl'ectivemeans for so treating the grain, while eliminating all posslbility of fire and. of overheating the grain.

' Another object of our invention is to provide such an apparatus asshall be exceed:

ingly efiicient for the purpose named. l

hese and such other objects its'mny hereafter appear are attained by ourinvention, as shown in the convenient embodiment thereof found in theaccompanying drawings, in which- F-gure 1 is n side elevation, partiallyin section, of one form of our present apparatus;

to the interior of the casing G.

and Fig. 2 is a like view of s modification thereof.

Like letters of reference indicate the same parts in the several figuresof th drawings,

Referrin by letter to the accompanying drawings, g indicates a. portionof e fsn-iiiier form of stack for the treatment of grain,

The exact form of stack, however, constitutes no part of our invention.Therefore the part marked A may be taken as typically indicating any,suitable compartment for treating grain, whether in a moving column orin a stationary body.

B indicates afznnilicr form of inmates for generating sulfur fumes byburning sulfur in the pen C.

D is e fumes-conduit leading to the eye of the fan E, and d is a valvefor admitting air to mix with fumes when desired, the pipe F leadingfrom the eduction-port of the fan E This casing contains a. usntity ofcoke, pumice-stone, broken bric r, or like meteriel, through whichfluid, gases, and thelike may readily pass. H is o. hence-pipe lendingironithe .casin G to the rsin treetini corn ertment.

l is en outlet-pipe leading from the casing G to any "su tablereservoir, such "as J, seid passing tnIOll in volume wil be the moisturepassing with reservoir being, if desired, provided with an overflow-pipej. K is e. pump arranged to pump water or other fluid from the reservoirJ through the pipe L' 'aiTd thence back through the pipe M into thecasing G. With the :tpperatusso constructed the fan E exheusts from thefurnace B the fumes gener-. stei by burning the sulfur in the pan 0 andforces these fumes into the base of the casing G. At the same time, bymeans of the construction shown in Fig. 1, it is again pumped back intothe casing G. The fumes entering the casing G through the pipe F arescattered and retarded in their passe e through said casing by thepresence of t e broken mess G and are brou ht in intimate contact withthe moisture which permeates the broken mess G thus coohng the fumes, ifdesired, by making the casing G of proper length, elimineting ellpossibility of fire from the burning sulfur coming in contact with thegrain to be treated and facilitating the combination of the sulfurousoxid in the fumes with the hydrogen in. the water to form the bleachingagent, sulfurous acid, while the fumes not absorbed by the water willescape through the fumes-pipe H with more or less moisture, in theforin'cf vapor, into the treating-compartment.' The shorter the ca-si'nG the hotter will become the water h the casing. and thegreeter thefumes through the pipe H to the treetin compartment. For manypurposesthe su iurous fumes escaping through the pipe H will carry withthem sufiicient moisture for the bleaching or treatment ofthe grain. If,however, more moisture bereqluired under any given conditions, the grainmay be moistened in enyifsmiliar manner, although weprefer, whenadditional moistureis needed, in form as shown in Fig. 1, using asteamjet in an open'port orconnection, as shown inour Letters PetentNoT328359, whereby the steam-jet entering the nesting-compare ment willdraw a; current oi with it, thus neutralizing the hestiof-thesteem.Still it may deemed desirable at times to inject the steam through theport a and to carry s too IIO

condensing medium, such as air or water,- into the stack A through theseparate port a.

It will be seen that with our present apparatus we provide means whichmay be utilized to suiliciently cool the fumes, if desired, to preventoverheating of the grain and to avoid a l danger of lire to the buildingin which the apparatus is located and at the same time facilitate theproduction of the desired bleaching agent and provide means whereby thebleaching agent may carry .with it into the treating-compartment more orless of the moisture required for the ellieient treatment of the grain.It will also be recognized-that where the apparatus shown in P ig. 1 isused the water, which is passed rapidly through the broken mass Gr, willultimately become saturated with the sulfurous fumes and becomeincreasingly heated until there will be a free evaporation of thesulfur-im pregnated water through the pipe H into the grain-treatingcompartment.

in Fig. 2 we have shown our apparatus so modified that the grain may bedirectly treated with the diluted sulfurous acid,.whicu escapes from thecasing G through the pipe I into the tank J, and may be treated with thesulfurous-acid fumes which escape from the casing G through the pipe H,which is controlled by the valve it, fresh water or other suitable fluidbeing supplied to the casing G from a reservoir N through pipes O P by apump Q, the fluid as it escapes from the bottom of the casing G beingpumped to the desired point by a pump it and sprayed by force for bysteam onto the grain. The pumps Q and K may be so related to each otherthat a substantial. y constant level may 'be maintained in the tank J.

is a by-pass pipe leadin fronvthe :pipe M to the reservoir J andcontrolled by a pressure-valve It, so that while the pump K may operateat a uniform speed the amount of fluid discharged into the casing A. maybe controlled at will, and any pressure generated within the pipe M willopen the valve it:

in using the vaporous fumes and the moisture they carry we prefer theembodiment of our present invention found in Fig. 1, while we prefer themodification thereof found in Fig. 2 when the diluted sulfurous I acidescaping through the bottom of the casing G is to be sprayed against thegrain, using or not using at the same time, as may be preferred, thesulfurous fumes passingfrom the casing G. In the one case the lreatii:fumes may carry with them the necessary moisture for tho eli'ectivetreatment of the grain. in the other case the water or other fluid whichis projected against the grain carries all necessary moisture and withit in solution a quantity of the bleaching clenwnt, and the be projectedagainst gram to 1 quantity of the bleaching element thus held insolution can be regulated to any extent dc sired and any strength ctsolution made by varying the proportions of the casing 'Li and the..m0unt of water passed through it; but obviously a wide range oftreatment can be attained by using either the fumes from the top of thecasing or the solut ion from the bot tom of the casing, or the two incombination.

When only the solution from the bottom of the casing is used and not thefumes, such solution provides both the moisture and the bleachingelement and may be projected against the grain at any plzu e desired,preferably when such grain is being moved from one bin to another, andwhen this solution only is used in the treatment of grain notreating-casing G is necessary.

In view of the fact that means are provided for fuming the fumes throughthe casing G the fumes may be iHtIOdIKOKl at any convenient point in thecasing (l, and therefore may be forced upwardly or downwardly, may bedesired.

t should be understood that in the drawings we have merely illustratedsuggestive and convenient embodiments of our present invention; butobviously many variations may be made therefrom without departing fromthe spirit of our invention.

We claim-- 1. In a grain-bleacher, the combination with atreating-compertinent, of means for generating treating-fumes, a casingcontaining a mass of loose material, means for eonducting said fumesinto said casing, means for projecting free moisture into the upper artof said casing, and means for conduct mg the fumes from said casing tothe grain treating wmpartutcnt.

2. in a graiu-blcaoher, the combination of a treating-compart1iLout, amixirig-compartment having its upper portion in communication with thetreating-compartment, said mixing-eomparlutcut containing a mess ofbroken material, a fumes-furmrce in communication with the lowerportion'ot' the mixing-compartn'gent, means adapted to main tam a flowof water through the mass of broken material, and suitable means adaptedto conduct water from the lower part of the mixing-compartuzeut to thetreatingcom pertinent.

S. in a graiu-bleacher, the combination of a fl!n;csgonerator, a casingcontaining a mass of loose material, the lower portion of the casingbeing in comuumicution with the lun1cs-generutor so that fuucs may risethrough the mass of material in the casing, means for supplying water tothe upper part of the casing so that the some mayllowdownwardly throughthe mass of material, a pipe leading from the'lowcr part of the casing,

F and nmaus adapted to utuiutain a flow therethrough whereby water fromthe casing may i he treated.

in a grain-blcacher, t'i-z: combination of a casing containing with atreating-stack,

ilO

amass of irregularmaterial, the upper part of the casing being incommunication wit the stack, a source of treating-fumes in communicationWith the lower part of the stack, conducting means in communication withthe casing above and below the mass of material, means for circulatingWater through said conducting means and the mass of material, and meanswhereby a portion of the Water may be withdrawn and projected into thestack. 1

5. In a grain-bleachcr, the combination of a treating-stack, a casingcontaining a mass of broken material, a fumes-furnace adapted to supplytreating-fumes to the casing, means for conducting fumes from saidfurnace to said stack, a reservoir in communication with the lower partof the casing, a pipe leading from the reservoir *and opening intoadapted to circulate through the casing,

the upper part of the casing, a body of water 20 the reservoir and pipeand a pump adapted to maintain the circulation of the water.

6. The combination with a vertical stack arranged to receive acontinuously-flowing body of grain, of a sulfur-furnace, a casingcontaining a mass ofloose material such as coke, means or conducting thefumes from said furnace into said casin means for projecting freemoisture into t e upper part of said casing, and means for conductingthe fumes from said casing to said vertical stack.

HARRY J. CALDWELL. JAMES R. BARR.

Witnesses:

S. B. HEUsEn, JAMES BOLDMAN.

